Wheeled vehicle differential gear

FIELD: machine building.

SUBSTANCE: invention relates to vehicles, in particular to self-locking differential gears and can be used in both transfer box and wheel gears. The propose vehicle differential gear comprises the housing, final drive, differential gear housing with half shaft gears and cams fitted therein. The said half shaft gears are in mesh with differential pinions. The said cams are helically-cammed with half shaft gears to get in contact with the push rods furnished with rollers. The thrust bearing is fixed on the reduction gear housing, the bearing movable race features a cam-like surface to interact with push rod rollers. The bearing cage inner surface features helical grooves or a diametral bore with through holes. The coupling holds the cage down to the thrust bearing fixed race with the help of plate spring.

EFFECT: mechanical control over differential gear capable of distinguishing between slipping and normal operating conditions.

9 dwg

 

The invention relates to vehicles, in particular for locking the differentials. Can be applied in the transfer case, and wheel gearboxes, giving the car all-wheel drive in constant action.

Known self-locking differential, comprising a housing and installed inside half-shaft gear connected through gearing with satellites that are installed on the spikes spider, friction clutch, the friction surface which are connected to one satellite, and the other with a thorn cross (analog - Lipatov AH Differentials of automobiles and tractors. M: "engineering", 1972, s-84, RIS).

The disadvantage of this differential design is the complexity caused by the presence of the support washers and their connection with the satellite and thorn cross, which increases the intensity of the differential.

Known differential lock of a vehicle, containing a Cam clutch, made of two parts, one of which is movable in the axial direction and kinematically linked with the controls, and the other equipped with fixed coaxially mounted ring with mechanical Cams with profiled tops (similar as the USSR №659423, UK 17/20).

The disadvantages of the mechanism are increased dynamic load when the switch is AI differential, the complexity of manufacturing the split ring and the Assembly of the locking mechanism.

Know the differential lock wheeled vehicles containing connected through gearing with satellites spring-loaded in the axial direction of the axle with connecting teeth and actuated by the pressure of the working agent the power cylinder (similar A.S. No. 1047741, UK 17/20).

A disadvantage of the known device is the design complexity of the device, differential lock, which reduces the reliability of his work.

Known self-locking conical differential with locking device in the form of a paste with teeth on opposite sides, fixed on the axis satellites and interacting with the opposite teeth of the gears, when you slip, blocking their rotation (prototype - patent RU 2090793 C1, Kuzevanov VM). The disadvantage of this solution is the inability to distinguish thrashing from the commit of rotation of the vehicle that is dangerous to traffic and the last characteristic of all locking devices in varying degrees.

The objective of the invention is to create a mechanical control system differential, able to distinguish the slip from normal movement of the vehicle and prevent it with great efficiency.

This object is achieved in that in the known differential, comprising a housing and installed inside half-shaft gear connected through gearing with satellites, provided by Cams having a support, which actuate the tappets with rollers, also located in the housing of the differential. The second part of the mechanism mounted on the housing and constitutes a thrust bearing. Moreover, the mobile holder of this bearing is made with a Cam surface, which interacts rollers pushers. The separator on the inner part has a surface with spiral grooves or diametrically channel with through holes (depending on the applied lubricant). The clutch is connected by splines with the differential case and based on the Belleville spring with an estimated force presses the separator to a fixed yoke.

A comparison of the proposed technical solutions with the level of technology on scientific, technical and patent documentation on the priority date in the main and adjacent sections shows that the set of essential features of the claimed solution was not known. Therefore, it corresponds to a condition of patentability "novelty".

Analysis of the known technical solutions in this field of technology has shown that the proposed device keepingi, which are not in the known technical solutions, and their use in the claimed combination of features gives you the opportunity to gain new economic effect, therefore, the proposed solution involves an inventive step compared to the current level of technology.

The proposed solution is industrially applicable, as may be produced industrially, workable, feasible and reproducible, therefore, meets the condition of patentability "industrial applicability".

Figure 1 is a kinematic diagram of the wheel gear with the proposed differential;

Figure 2 - General view of the gearbox Assembly;

Figure 3 - General view of the proposed differential;

Figure 4 - General view, cross-section;

Figure 5 is a General view without bearings (cross-section at an angle of 90°);

Figure 6 - General view without bearing section;

Figure 7 - cross section plane through the center of the satellite perpendicular to the main axis;

On Fig - block gear and pawls in engagement;

Figure 9 is an exploded diagram of the differential.

The differential includes a box 1, half-shaft gear 2, a support 3, 4 satellites, the clutch 5, a separator 6, the yoke thrust bearing 7, the yoke thrust bearing with the Cam surface 8, the plungers 9, the rollers 10, the Belleville spring 11, the Cams bilateral engagement 12, maintains the thrust washer 13, balls thrust bearing 14, the Cams of the one-way gear 15, the bolts 16, the pins 17, the main a pair of gears 18, the gear housing 19.

For the kinematic scheme - wheel 20, the road surface 21.

The differential operates as follows.

During rectilinear motion of the vehicle has a main pair of gears 18, rotating the box 1. Gear axes 2, 4 satellites, the Cams 12, 15, pushers 9, the rollers 10, the yoke thrust bearing with the Cam surface 8 are stationary relative to the box 1. The separator 6 with balls 14 rotates with the average speed of rotation relative to the housing 19 and to the box of the differential 1. Clutch 5 through the Belleville spring 11 presses the separator 6 to the yoke thrust bearing 7. Through spiral channels on the surfaces of the separator 6 formed film hypoid lubricant between the mating surfaces when increasing the rotation speed of the box 1, is reduced sliding friction.

When turning or hitting an obstacle, as well as during a loss of traction of one wheel of the gear axes 2, 4 satellites rotate in different directions. The Cams 12, 15 make a reciprocating motion along the radius, resulting in the movement of the pushers 9 with the rollers 10, which force to rotate the clip from the Cam p is a surface 8 in different directions, depending on the direction of rotation performed by the vehicle. The separator 6, the compressible ferrule 7 and the sleeve 5, are equal and opposite-pole friction and pressure. In parallel, connect the power transmitted from the yoke 8 through the balls 14 with different sign depending on the direction of movement of the vehicle, causing the separator 6 to equalize the speed with transmission differential gear 1 or gear housing 19. From staying between the rubbing surfaces, the lubricant is squeezed out by the pressure of the spring 11. According to the design of the ferrule with the Cam surface 8 does not have sufficient strength to break the boundaries of momentum separator 6 (border 1 - housing, is always equal to 0, the boundary of the 2 - speed gearbox differential) because of the small angle of inclination of the spiral Cam surface. Consequently, the entire differential mechanism is limited in its actions, but not locked in a given range, allowing the vehicle without difficulty to make enough small turning radius.

The claimed solution in comparison with the prototype allows you to fully automate the operation of differential wheeled vehicles and to increase the reliability of the device due to the presence of mechanical logic, obtained by the proposed design solution and capable of difference is whether the steering of the car from losing traction wheels with the road surface (slip). The mechanism does not prevent to take a turn or hit a barrier, but also protects the car from stalling with great efficiency.

Differential wheeled vehicles, comprising a housing gear, main gear, the differential case defined it pausetime gears connected by gearing with satellites, characterized in that provided by Cams located in spiral engagement with pausetime gears with the possibility of contact with the lifters with roller skates, in-a-box differential; on the gear housing is fixed thrust bearing, a movable holder which is made with a Cam surface, which interacts rollers pushers, and the separator has on the inner part of the surface of the spiral grooves or diametrically channel with the hole in the device is activated coupling connected by splines to the housing of the differential, based on the Belleville spring with an estimated force and presses the separator to a fixed yoke.



 

Same patents:

Bevel gear // 2341385

FIELD: transport.

SUBSTANCE: bevel gear contains casing (1) with opposite axle shaft gears (2, 3) axis of channel whereof forms acute angle with casing rotation axis of channel. On differential pinion axis (6) collets (10) are installed capable of shift along axis. Pinions (4, 5) engage with collets and penetrating into narrowed zone located between axle shaft gears are seized transmitting torque to stopped axle shaft gear and stopping slippage.

EFFECT: increase of bevel gear slippage properties.

5 dwg

FIELD: machine building.

SUBSTANCE: invention relates to transport machine building, in particular, to automotive and tractor driving axles. The self-locking differential incorporates housing (2), driven gear wheel (1), output half-axles (7), two free travel mechanisms, driving gear coupling (4) with end face trapezoidal teeth and two driven half-couplings with the like teeth rigidly coupled with the free travel mechanism driven cages (6). Gear coupling (4) with the end face trapezoidal teeth is linked with housing (2) to axially move. The distance along the axis between the tooth crests of one and the tooth space of the other driven half-coupling equals the axial distance between the driving coupling (4) crests. The number of end face teeth of each half-coupling is a multiple of the number of locking bodies (8) of the free travel mechanisms. Both such mechanisms are arranged so that, on cutting in, the driven half-coupling crests get aligned with the driving coupling (4) tooth spaces. The driven half-coupling and driving coupling (4) teeth feature an identical profile.

EFFECT: higher safety of vehicles and simpler design of self-locking differential.

2 dwg

FIELD: mechanic.

SUBSTANCE: the self-blocking differential contains a power-driven shell with lids, in which half shaft elements are placed coaxially and connected with the half shaft. The half shaft elements, on their external surface, have spiral grooves with a semi-circular cross-section, the direction of which is reverse to that of the spiral, rolling elements (balls) filling the closed channels in the power-driven shell, in chains. The closed channels contain working grooves open for inserting ball segments into the spiral grooves. The longitudinal bypass channels and the side return channels are formed by slots in the lids and cuts around the perimeter of the distribution washers installed on the half shaft elements. The distribution washers have a diameter equal to the working groove dimension.

EFFECT: increases reliability of self-blocking differential.

2 cl, 1 dwg

FIELD: mechanic.

SUBSTANCE: the self-blocking differential contains a power-driven shell with lids, in which half shaft elements are placed coaxially and connected with the half shaft. The half shaft elements, on their upper surface, have spiral channels running in a direction opposite the spiral, odd number of rolling elements (balls), one closed channel containing a working groove open for inserting ball segments into the spiral channels of the half shaft elements; a longitudinal return channel with dimensions equal to the ball diameter, connected by intermediate channels made in the lids of the power-driven shell. The outside surface of the intermediate channels in the longitudinal section has a radius equal to 1.25 diameters of the ball; and their wall, at the outlet to the zone of connection to the return channel, contains a straight section. In the lids, a slot with dimensions equal to those of the working groove is made for placement of spiral channels of the half shaft elements in the intermediate channels area.

EFFECT: increased reliability of self-blocking differential.

4 cl, 2 dwg

FIELD: transport engineering; vehicle transmissions.

SUBSTANCE: invention can be used in differential drives of vehicles with possibility of automatic wheel locking. Proposed self-locking differential of vehicle contains drive case accommodating axle-shaft members coupled with axle shafts and provided on outer surface semi-round in cross section screw grooves of opposite hand of helix, solids of revolution in form of balls filling, in chain, closed channels made in drive case and containing working grooves opened to dip ball segments into screws of axle-shaft members, longitudinal bypass channels and side return channels. Inner part of case consists of three parts. On extreme parts working grooves are made with opposite direction of helix relative to each other and to screw grooves of axle-shaft members. Middle part is made with width not exceeding diameter of balls and is furnished with through axial holes corresponding to size of diameter of balls. Angle of tilting of working and screw grooves to longitudinal axis is 74-76°. Side return channels in longitudinal section are made with sizes steplessly increasing from diameter of ball on ends of channels to 1.5 diameter of ball in central part of channels. Longitudinal bypass channels in cross section are made to size of diameter of ball, and inner side of channels is made at angle of 1-2° to center of bypass channel, with stepless transition in place of connection.

EFFECT: improved reliability and efficiency of locking.

4 cl, 3 dwg

FIELD: automotive industry.

SUBSTANCE: invention can be used in differential drives of wheeled vehicles made for automatic locking of wheels. Proposed self-locking differential of vehicle contains drive case 1 accommodating axle shaft-members 4, 5 arranged coaxially to each other and coupled with axle-shafts 2, 3. Said axle-shaft members are provided with helical grooves 6, 7 on outer surface with opposite hand of helix, solids of revolution in form of balls 8 filling in line at least one closed channel 10 made in drive case. Part of said channel is opened to dip segments of balls into helical grooves. Closed channel 10 is made rectangular in longitudinal section, with rounded off outer angles 12. Cross section of legs of rectangular closed channel is equal to diameter of balls 8. Number of balls in channel is odd.

EFFECT: simplified design of differential, reduced overall dimensions, increased manufacturability, strength and efficiency at self-locking.

4 dwg

FIELD: mechanical engineering; vehicle transmissions.

SUBSTANCE: proposed differential contains case 1, side gears 2, and 3, planet pinions and locking device. Locking devices is made in form of ring shifter 7 connected with drive 8, pushers 10 arranged inside axles 9 of planet pinions, intermediate members and locking members. Differential includes also elastic stop, and spring inserts 17 and 18 placed between case 1 and rear surfaces 20 and 21 of side gears 2 and 3. Grooves are made on end face front surfaces of side gears 2 and 3. Said grooves have wavy profile corresponding to profile of locking members, and number of radial grooves is even.

EFFECT: prevention of failure of differential lock caused by wedging of locking members between side gears, and falling out of locking members at unlocking, provision of stepless row of values of locking coefficient.

5 cl, 6 dwg

FIELD: transport engineering.

SUBSTANCE: invention can be used to increase cross-country capacity and stability of vehicle at braking. Proposed differential lock mechanism contains locking device in form of friction mechanism including two members 1 and 2. Friction mechanism consists of pack of friction disk 3 and steel disks 4, two control pistons 7, air feed head 8 with union 9. Members 1, 2 of clocking device are connected by pairs of gears 10, 11, 12, 13 with axle-shafts 14, 15. Device is furnished additionally with air fed control system consisting of angular velocity pickups 16, 17, electronic control unit 18, electromagnetic control valve 19, relief valve 20, change-over switch 21, connecting air lines and electric wires.

EFFECT: increased cross-country capacity and stability of vehicle.

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FIELD: mechanical engineering.

SUBSTANCE: invention relates to methods of control of differential locking of multidrive wheeled vehicles and it can be used at designing of systems to control tractive forces of driving wheels of multidrive vehicles and carrying out investigations of wheeled vehicles. proposed method of control of differential locks comes to locking of differential for definite periods of time at threshold values of mismatching of mechanical parameters of driving wheels intercoupled by said differential and unlocking differential at expiration of definite of time or at achievement of threshold value of steerability index. Unlocking of differentials at achievement of threshold value of steerability index is carried out individually, starting from differential whose locking has greater effect on steerability of wheeled vehicle.

EFFECT: enlarged range of control of traction forces on driving wheels to increase cross-country capacity and traction and speed properties at provision of required steerability of multidrive wheeled vehicles.

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Muscular drive // 2270780

FIELD: transport engineering; bicycles.

SUBSTANCE: invention is designed for devices automatically changing gear ratio without interruption of power flow. Proposed drive contains two differentials. Force sensor 5 is installed between input shaft 8 and common input of both differentials, namely power differential 1 and regulating second differential 2. Said force sensor 5 cuts in braking device 4 at rise of load, said braking devices is idling at direct drive and is connected with regulating input of second differential 2. As a result, output gear 21 of second differential 2 starts rotating and self-braking drive 3 releases carrier 25 of power differential 1. Proposed drive automatically changes over from direct drive to drive with changed gear ratio. Moment of changing over can be regulated by tensioner 6 of spring 19 of force sensor.

EFFECT: facilitated selection of step-down gear in wide range of gear ration depending on individual capabilities of user.

1 dwg

FIELD: transport.

SUBSTANCE: through hypoid final drive contains crank case (1) of reduction gear, drive collar (2) installed on drive shaft (3) and connected with center differential via gearing. Driving gear (4) is installed on drive shaft (3) and it is connected with driven gear (18) made as one whole with center differential cup (11). One semi-axle pinion (22) of centre differential is connected with driving hypoid gear (7) installed on tapered bearings (5) and (6). Other semi-axle pinion (21) of centre differential is connected with through shaft (25) of rear final drive horizontal axis of which is located below inter-wheel differential gear (26) axis via gearing. Driving gear (15) of gearing is connected with semi-axle pinion (21) and it is installed on bearings (16) and (17). Driven gear (23) is connected with through shaft (25) of rear final drive.

EFFECT: increase of service life of cardan shaft connecting through hypoid final drive with gear-box, increase of service life of hypoid drive.

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Bevel gear // 2341385

FIELD: transport.

SUBSTANCE: bevel gear contains casing (1) with opposite axle shaft gears (2, 3) axis of channel whereof forms acute angle with casing rotation axis of channel. On differential pinion axis (6) collets (10) are installed capable of shift along axis. Pinions (4, 5) engage with collets and penetrating into narrowed zone located between axle shaft gears are seized transmitting torque to stopped axle shaft gear and stopping slippage.

EFFECT: increase of bevel gear slippage properties.

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FIELD: transport.

SUBSTANCE: invention refers to transportation equipment. Drive axle (1) includes crankcase (2) where main bevel gearing (3) with input shaft (5), drive gear (4) and driven gear (6) are located. Driven gear may be installed on one of mounting seats (27) or on casing (7) of symmetrical planetary differential (9) connected by sun gear (17) and carrier (12) with respective shafts (18) and (19) of wheel drives. Drive axle (1) of all-wheel-drive vehicle is made with control device (20) for differential (9) connected with carrier (12) and casing (7) of differential (9). Axles (13) are fixed in carrier (12) to avoid rotation and axis shift by check plates (36) in slots (37) of axles (13) of planetary rollers (14), (15) and in grooves (38) of part (11) of carrier (12) made as a lid.

EFFECT: simplification of construction design and enhancement of device reliability.

8 cl, 9 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to motor industry. The rpm controller represents a device incorporating a planetary differential gear with driving spider (2) and two various-diameter gear wheels (5, 12). Central gear wheel (5) runs opposite to the running spider (2) to transmit engine power to output shaft (6) via the reduction gear that changes the direction of rotation. Central gear wheel (12) runs in the same direction with spider (2) to transmit rotary motion to output shaft (6) via friction clutch (13). Adjusting actuator with a controlled signal, a function of the engine shaft rpm, varies the rotary motion transmission ratio and allows accelerating or decelerating output shaft (6) along with changing the transmission ratio from its maximum to zero.

EFFECT: automatic adjustment of the engine rpm with variation of transmission ratio in transient behavior.

1 dwg

FIELD: machine building.

SUBSTANCE: wheel planetary gearbox consists of driving bevel gear (1), installed at semi-axis (2), driven bevel gear (3), installed at the axle splines (4), cone satellites (5), installed at cross pins (6). Pins (6) are installed in the mating holes of internal body (7) and external body (8). Bodies (7, 8) are mutually connected by bolts (9). A deepening for thin-wall sleeve (10) is provided at the bodies' mating location, at bodies' external surface. Sleeve (10) is installed flush to the external surface of bodies. Circular grooves are made in the deepenings of bodies (7, 8) from different side of cross pins (6). O-rings (11) are installed in the circular grooves. The internal surface of thin-wall sleeve (10) interacts with O-rings (11).

EFFECT: simplification of sealing of mated surfaces of internal and external bodies; maintaining the overall dimensions of gearbox; ensuring sufficient strength the tho gearbox.

1 dwg

FIELD: mechanic.

SUBSTANCE: the self-blocking differential contains a power-driven shell with lids, in which half shaft elements are placed coaxially and connected with the half shaft. The half shaft elements, on their external surface, have spiral grooves with a semi-circular cross-section, the direction of which is reverse to that of the spiral, rolling elements (balls) filling the closed channels in the power-driven shell, in chains. The closed channels contain working grooves open for inserting ball segments into the spiral grooves. The longitudinal bypass channels and the side return channels are formed by slots in the lids and cuts around the perimeter of the distribution washers installed on the half shaft elements. The distribution washers have a diameter equal to the working groove dimension.

EFFECT: increases reliability of self-blocking differential.

2 cl, 1 dwg

FIELD: mechanic.

SUBSTANCE: the self-blocking differential contains a power-driven shell with lids, in which half shaft elements are placed coaxially and connected with the half shaft. The half shaft elements, on their upper surface, have spiral channels running in a direction opposite the spiral, odd number of rolling elements (balls), one closed channel containing a working groove open for inserting ball segments into the spiral channels of the half shaft elements; a longitudinal return channel with dimensions equal to the ball diameter, connected by intermediate channels made in the lids of the power-driven shell. The outside surface of the intermediate channels in the longitudinal section has a radius equal to 1.25 diameters of the ball; and their wall, at the outlet to the zone of connection to the return channel, contains a straight section. In the lids, a slot with dimensions equal to those of the working groove is made for placement of spiral channels of the half shaft elements in the intermediate channels area.

EFFECT: increased reliability of self-blocking differential.

4 cl, 2 dwg

FIELD: transport engineering; mechanical engineering.

SUBSTANCE: planetary gear driven in two-speed final drive of axle is installed in drive pinion case. Ring gear 23 is mounted on hub 24 made integral with clutch member 26 for rotation relate to hub 10 of carrier and is made for connection by clutch 27 with clutch member 32 belonging to case 14. Carrier hub 10 is constantly coupled by connecting clutch 8 with driven shaft and it is arranged coaxially to drive and driven shafts. Connecting clutch 8 has external teeth 9 engaging with teeth of clutch 27 connecting driven and drive shafts with ring gear hub. Drive shaft 15 is installed on additional bearing 17 fitted in bore 18 of driven shaft 3. Hub 24 ring gear with clutch member 26 is installed on bearing resting on carrier hub.

EFFECT: slowed down speeds, increased cross-country capacity of vehicle.

3 cl, 1 dwg

FIELD: transport engineering; vehicle transmissions.

SUBSTANCE: invention can be used in differential drives of vehicles with possibility of automatic wheel locking. Proposed self-locking differential of vehicle contains drive case accommodating axle-shaft members coupled with axle shafts and provided on outer surface semi-round in cross section screw grooves of opposite hand of helix, solids of revolution in form of balls filling, in chain, closed channels made in drive case and containing working grooves opened to dip ball segments into screws of axle-shaft members, longitudinal bypass channels and side return channels. Inner part of case consists of three parts. On extreme parts working grooves are made with opposite direction of helix relative to each other and to screw grooves of axle-shaft members. Middle part is made with width not exceeding diameter of balls and is furnished with through axial holes corresponding to size of diameter of balls. Angle of tilting of working and screw grooves to longitudinal axis is 74-76°. Side return channels in longitudinal section are made with sizes steplessly increasing from diameter of ball on ends of channels to 1.5 diameter of ball in central part of channels. Longitudinal bypass channels in cross section are made to size of diameter of ball, and inner side of channels is made at angle of 1-2° to center of bypass channel, with stepless transition in place of connection.

EFFECT: improved reliability and efficiency of locking.

4 cl, 3 dwg

FIELD: automotive industry.

SUBSTANCE: invention can be used in differential drives of wheeled vehicles made for automatic locking of wheels. Proposed self-locking differential of vehicle contains drive case 1 accommodating axle shaft-members 4, 5 arranged coaxially to each other and coupled with axle-shafts 2, 3. Said axle-shaft members are provided with helical grooves 6, 7 on outer surface with opposite hand of helix, solids of revolution in form of balls 8 filling in line at least one closed channel 10 made in drive case. Part of said channel is opened to dip segments of balls into helical grooves. Closed channel 10 is made rectangular in longitudinal section, with rounded off outer angles 12. Cross section of legs of rectangular closed channel is equal to diameter of balls 8. Number of balls in channel is odd.

EFFECT: simplified design of differential, reduced overall dimensions, increased manufacturability, strength and efficiency at self-locking.

4 dwg

FIELD: transport engineering; transmissions of wheeled vehicles.

SUBSTANCE: proposed differential lock control system contains fluid medium supply source with reducing 7, three-position distributor 11, two-chamber cylinder consisting of control space A of lock-up clutch 4 formed by its housing and movable partition 34, and additional diaphragm chamber 6 having its control space Б arranged coaxially and in series relative to control space of lock-up clutch 4. Movable partition 34 is connected with pressure disk 29 by means of rod 30 rigidly connected by one end with pressure disk 29. Rod 30 interacts with diaphragm 32 of additional diaphragm chamber 6, and it passes in its middle part through central part of movable partition 34, being rigidly connected with support plate 33 interacting with partition 34. Space Б of additional diaphragm chamber 6 communicates with three-position distributor 11 selectively communicating said spaces with drain main line 14 and reducing regulated valve 7.

EFFECT: increased capacity owing to automatic reduction of locking at cornering of vehicle and decreased skidding of leading wheel.

2 dwg

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